Internal-combustion engine auxiliary shafts for driving auxiliary engine units



lam. I7, i956 F. A. E. PORSCHE ET AL INTERNAL-COMBUSTION ENGINE AUXILIARY SHAFTS FOR DRIVING AUXILIARY ENGINE UNITS Filed Sept. 29, 1953 WMM Wwf-ILM En W f )MMJM 741 mms# INTERNAL-COMBUSTION ENGINE AUXILIARY SHAFTS FOR DRIVING AUXILIARY ENGINE UNITS Ferdinand A. E. Porsche, Stuttgart, and Robert Binder, Winnenden, Germany, assignors to Dr. Ing'. h. c. F. Porsche K.G., Stuttgart-Zuffenhausen, Germany Application September 29, 1953, Serial No. 383,038

Claims priority, application Germany October 15, 1952 3 Claims. (Cl. 12S-195) This invention relates to improvements in auxiliary shafts for internal combustion engines for driving the individual auxiliary units requisite to the operation of the engine, and more particularly to-a single auxiliary shaft and readily removable mounting means therefor for driving a plurality of units, such as the ignition distributor,

the lubricating oil pump and the fuel supply pump of theA ICC able unit for carrying and operating the various auxiliary units necessary for the operation of the internal combustion engine. Furthermore, the arrangement is such that all these auxiliary units may be removed as a whole with the auxiliary shaft and its supporting standard or they may be removed from such supporting standard individually.

The invention includes other features and advantages described more in detail hereinafter in connection with the accompanying drawings, representing by way of example one form of construction.

In the drawings:

Fig. l is a broken longitudinal sectional view through an internal combustion engine provided with an auxiliary shaft construction and mounting according to the present invention, and

Fig. 2 is a sectional view taken on the line Il-iI of Fig. l.

The internal combustion engine illustrated in the drawings includes a casing shown generally at 1 and not further illustrated in detail, a cam shaft 5 driven ina known manner by a crank shaft 2 through a pair of spur gear wheels 3 and 4. In accordance with the invention, the engine is provided with an auxiliary shaft 6 driven from the cam shaft 5 by a worm gear 7 carried on the cam shaft which meshes with a worm gear 8 fixed to the auxiliary shaft 6. The auxiliary shaft 6 extends perpendicularly to the cam shaft 5 and is provided at its upper and lower recognized and it has been proposed to drive some of the A I units from a common auxiliary shaft, but in so doing, the separate units were individually mounted on the side walls of the engine block in positions adjacent to the auxiliary shaft. For example, in one known construction, the ignition distributor is held fixed on the cylinder p g head by a bracket, while the fuel delivery pump is anged to the crank casing. Such constructions as this` are expensive to manufacture.

In another known construction, some of the important auxiliary units of the engine are assembled into an auxiliiary engine set which is secured to the motor block. This engine set has no independent units, but on the contrary is supplemented by a multipart casing of the entire group and have the disadvantage, as experience has shown, that the individual units cannot be disconnected in the event ofdamage and the necessity of repairs. The cost of re pairs is, therefore, considerably increased because the entire auxiliary engine set must be replaced.

The primary object of the present invention is to proi In accordance with the invention, the difficulties and disadvantages referred to above are obviated by providing an auxiliary shaft, preferably driven by the cam shaft of the engine, arranged in a supporting standard which is mounted in an opening provided in the body of the engine, such as the crank casing or motor block, said shaft and standard being readily installed and readily removable as a whole from the engine block or crank case and adapted to carry and operate auxiliary units such as the ignition distributor, the fuel delivery pump and the lubricating oil pump.

In this construction, the supporting standard for the auxiliary shaft includes supporting, guiding and bearing means for the shaft, thereby avoiding the necessity of machining bearings in the engine block or crank case.

The improved construction provided by the present invention constitutes a compact, simple and readily mountends with driving connections 9 and 10 for respectively driving an ignition distributor 12 and a lubricating oil pump 11, the driving connections 9 and 10 comprising the usual tang fitting in a slot. The auxiliary shaft 6 is also provided with a cam 13 for driving a fuel delivery pump 14.

In accordance with the features of the invention, the shaft 6, the ignition distributor 12 and the fuel pump 14 are mounted on and supported by a supporting standard 15. While the lubricating oil pump 11 is shown in its usual position in the crank case and supported thereby, it is to be understood that in an appropriate construction, this pump may also be supported on the standard 15. Likewise other units necessary for the operation of the engine may be supported on the standard, such for example as the ignition coil 16 as shown in Fig. 2 of the drawings.

The supporting standard 15 is provided with a flange 17 and a bore 1S, the latter of which is axially aligned with respect to the shaft 6 for receiving and supporting the ignition distributor 12. In this construction, the supporting shank of the distributor tits in the bore 18 and this bore serves as a bearing for the upper enlarged end portion 6 of the auxiliary shaft 6. The standard also includes a side opening deiined and surrounded by a flange 19 for supporting the fuel delivery pump 14 attached to the standard by means of screws 20. A packing disc 21 including a guide 22 of packing material is inten posed between the attachment iange of the fuel pump 14 and the flange 19, the guide 22 extending from the packing disc inwardly through the flange 19 serving as a guide for the pump actuating plunger 23, which is spring biased against the cam 13 on the shaft 6. In accordance with the arrangement shown in Fig. 2, the ignition coil 16 is located on the opposite side of the standard 1S from the fuel pump 14 and is held in position on an attachment 24 by means of screws 25.

The supporting standard 15 not only serves to support the various auxiliary units in operating position on the engine but also serves to position and support the auxiliary driving shaft 6, and for this purpose the standard 15 includes an inwardly extending guiding section 26, extending to the hub of the worm gear 8. The upper end 27 of the section 26 is constructed in the form of a bearing surface upon which acollar 28 carried'by the shaft 6 rests and is supported. The section 26 serves as a bear ing as well as a guide forthe shaft 6.

The supporting standard 15 is hollow around the shaft 6 between the parts 13 and 2S and is provided with a filling nozzle 29 for lubricant as shown in Fig. l. The nozzle 29 connects into a lubricant chamber 3i) from which lubricant is supplied to the bearings of the auxiliary units actuated by the auxiliary shaft 6 and carriedv by the supporting standard 15. ln the construction as shown` it will be seen that lubricant 'from the chamber 3l! will lubricate the lower end of the distributor shaft and the upper end of the auxiliary shaft 6 connected thereto as well as the cam 13. Lubricant supplied through the filling nozzle 29 flows into the hollow portion of the supporting standard l5 and into the crans through an opening 35 located above the collar and beerdig- 2"? so that some lubricant is retained above the collar '23 for lubrication of the bearing 'i' and the shaft 6 in the guiding support bearing 26.

ln order to properly tit and center the supporting standard i5 in the casing i., the supporting standard is `provided with a flange 3i to which is connected a collar 32, tilting and bearing in an opening 33 in the casing i. The supporting standard .15 is secured to the engine by means of screws 34. inf this construction the ange 31 rests directly on a prepared flat surface of the casing 1 surroundinf,r the opening 33 so that the supporting standard is properly centered and positioned in the casing with the auxiliary shaft 6 in its correct position.

Because of the foregoing construction and arrangement of the parts in accordance with the invention, the ignition distributor 12, the fuel delivery pump i4, the ignition coil 16 and any other unit mounted on the standard i5 can be readily disconnected from the supporting standard as individual units or the entire assembly can be removed from the engine as a Wholealong with the supporting standard l5 and shaft 6. When it is desired to remove the supporting standard along with the distributor, fuel oil pump and ignition coil, the screws 35i are removed and the standard merely lifted out of the casing along with the shaft 6 and the worm gear S. The construction according to the present invention therefore has the advantage that both in manufacture and repairs, the entire assembly with the supporting standard Vmay be made and the necessary adjustments accomplished before the standard i5 and shaft 5 are inserted and attached to the engine. When the standard is removed the shaft 6 may be taken out through the bore 1S after removing the worm gear 8.

From thc foregoing description it will be readily understood that the invention is .notrestricted to the particular constructional example illustrated, the particular structure andarrangement of 'the supportingstandard depending entirely upon the construction of the internal cornbustion engine as a whole, it being immaterial whether or not the engine operates on the Otto cycle or as a diesel engine.

What we claim is:

1. In an internal combustion engine providedwitn an auxiliary shaft driven by the engine for in turn driving auxiliary units such as au ignition distributor and a fuel pump, the improvement comprising a readily removable supporting standard :mounted infan opening lin the body of the engine and in `which the auxiliary shaft is mounted and guided; means forv supporting the auxiliary units on said standard in drivingrelation with said auxiliary shaft, said supporting standard comprising a hollow structure defining a chamberthrough which said auxiliary shalt extends in spaced relation to the inside wall surface of the chamber, said hollow structure and chamber extending above and below the opening in the body of the engine, bearings for said shaft located respectively at the upper and lower ends of said chamber, the bearing in said standard at the lower end of said chamber including a bearing surface generally normal to the axis of the auxiliary shaft, and a'collar tixed to the shaft resting on said bearing surface and supporting the auxiliary shaft in position in the supporting standard, said supporting standard along with the auxiliary shaft and auxiliary units being readily removable as a Whole from the body of the engine.

2. An internal combustion engine as claimed in claim l, including a crank case, a lubricating oil pump located in the crank case of the engine, said auxiliary shaft in cluding an integral portieri extending from the end of said supporting standard in theV body of the engine and operatively connected with the lubricating oil pump tor el'- fecting its operation,

3. An internal combustion engine as claimed in claim l, in which said hollow structure and chamber is provided with a filling opening for lubricating oil located outside the body of the engine and with an opening inside the body of the engine for the ow of lubricating oil from the chamber of said supporting standard directly into the engine.

yReferences Cited in the tile of this patent UNITED 'STATES PATENTS 1,287,351 Laporte et al Dec. l0, 1918 1,422,995 'Link July 18, 1922 1,631,185 Anibal lune 7, i927 1,660,599 Davenport Feb. 2S, 1928 1,743,586 Wiltse Jan. 14, 1930 2,482,332 Eckert Sept. 20, i949 2,625,144 Stewart Jan. i3, 1953 A F- id.. 

